What sources do ATA manuals reference to ensure regulatory compliance?

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To keep aircraft maintenance in line with legal requirements, ATA manuals reference authoritative sources that establish what must be done. The best source set includes Airworthiness Directives, advisories, and applicable standards. Airworthiness Directives are legally enforceable by the aviation authority and mandate actions to fix unsafe conditions. Advisories provide additional, timely guidance from manufacturers or authorities that complements the ADs with recommended actions or timelines. Applicable standards cover the regulatory and industry benchmarks that govern how work is performed and documented, ensuring consistency with safety and design requirements.

Choices like pilot operating handbooks focus on flight crew procedures, airport regulations pertain to operations at airfields, and manufacturer marketing materials do not establish regulatory requirements for maintenance.